The present invention relates to a gas burner assembly (3), particularly for a household appliance, more particularly for a gas cooking appliance (1). The gas burner assembly (3) comprises a burner body (15) having a gas outlet port (59), a burner crown (11) having a gas inlet port (45) assignable to the gas outlet port (59) of the burner body (15) and a burner cap (13) covering a top side of the burner crown (11). The arrangement of burner crown (11) and burner cap (13) defines a mixing chamber and/or gas feeding channel (43) and is connected or connectable to a cookware support (9) in a way to enable a joint handling, particularly a joint coupling with or decoupling from the burner body (15). According to the invention, adjustment means (49, 51, 57) are comprised, which enable a relative movement, particularly a relative vertical movement, of the burner crown (11) and/or the gas inlet port (45) in relation to the cookware support (9).